package com.ls.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.util.ObjectUtils;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.websocket.Session;

@Configuration
public class MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

//        获取session
        HttpSession session = request.getSession(true);
        //判断用户ID是否存在，不存在就跳转到登录界面
        System.out.println("========拦截=========="+session.getAttribute("user"));
        if(session.getAttribute("user")==null){
            response.sendRedirect(request.getContextPath()+"/user/toLogin");
            return false;
        }
        return true;

    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}
